Photo: りなべるCC BY 4.0via iNaturalistresized / cropped
Chinese water chestnut Plant Care
Eleocharis dulcis Hensch.
Updated · Sources · How we source care data
This plant's most distinctive visual feature is its long, grass-like leaves that grow in clusters. Originating from Southeast Asia, Eleocharis dulcis is highly sought after by plant collectors for its unique tuberous roots that are edible and have a crunchy texture, making it a popular choice for aquatic gardens.
Every 2–4 days
Full sun to part shade
60–80°F
50–70%
At a glance
How do you care for Chinese water chestnut?
Water Chinese water chestnut every 2–4 days, letting the top layer of soil dry out between waterings, and give it full sun to part shade. It prefers temperatures of 60–80°F (16–27°C) and 50–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Chinese water chestnut Native To?
- Angola
- Australia
- Benin
- Burkina Faso
- Burundi
- Cameroon
- Cape Verde
- Central African Republic
- Chad
- Côte d'Ivoire
- Djibouti
- DR Congo
- Equatorial Guinea
- Eritrea
- Ethiopia
- Fiji
- French Polynesia
- Gabon
- Ghana
- Guinea
- Guinea-Bissau
- Kenya
- Liberia
- Malawi
- Mali
- Mauritania
- Mozambique
- New Caledonia
- New Zealand
- Niger
- Nigeria
- Papua New Guinea
- Republic of the Congo
- Rwanda
- Samoa
- Sao Tome and Principe
- Senegal
- Sierra Leone
- Solomon Islands
- Somalia
- South Sudan
- Sudan
- Tanzania
- The Gambia
- Togo
- Tonga
- Uganda
- Vanuatu
- Zambia
- Zimbabwe
What Is the Chinese water chestnut?
Chinese water chestnut (Eleocharis dulcis) belongs to the Cyperaceae family within the Eleocharis genus. Chinese water chestnut is native to Asia, tropical Africa, and Oceania. Chinese water chestnut is also known as Water chestnut, Arrowhead, Cattail.
Chinese water chestnut displays a grass-like, clumping growth habit, reaching up to 0.5 ft tall with a spread of approximately 0.5 ft. Chinese water chestnut produces inconspicuous small brown spikelets.
Leaf size: approximately 6 inches.
How Often Should You Water a Chinese water chestnut?
Eleocharis dulcis requires watering every 2–4 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 2–4 days
Let soil partially dry between waterings
What Light Does the Chinese water chestnut Need?
Chinese water chestnut thrives in full sun to part shade.
Light Requirement
Full sun to part shade
What Temperature and Humidity Does the Chinese water chestnut Prefer?
Eleocharis dulcis grows best at temperatures of 60–80°F. Chinese water chestnut prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–80°F
Humidity
50–70%
What Soil Mix Works Best for a Chinese water chestnut?
Soggy, nutrient-rich soil with high organic content. Good drainage is essential for Chinese water chestnut to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Chinese water chestnut?
Feed Chinese water chestnut every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Chinese water chestnut?
Divide and repot every 1-2 years in spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Chinese water chestnut?
Chinese water chestnut can be propagated through division, seeds. Similar propagation techniques also apply to purple spikerush plant care, which shares the same genus.
Is the Chinese water chestnut Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Chinese water chestnut, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Chinese water chestnut?
Chinese water chestnut is susceptible to aphids, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Chinese water chestnut Need?
Chinese water chestnut grows outdoors in USDA Zone 8a – 11b. It survives winters down to planting zone 8a. Chinese water chestnut is native to Asia, tropical Africa, and Oceania.
Hardiness Zone
Zone 8a – 11b
Keep exploring plants
Chinese water chestnut is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Eleocharis genus — compare its care with other Eleocharis species on PlantoScan.
Eleocharis is part of the Cyperaceae plant family — browse all Cyperaceae genera and species.
Chinese water chestnut thrives in bright light and direct sun — see other bright-light plants.
More Eleocharis Species
Other Eleocharis species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Eleocharis dulcis Hensch., family Cyperaceae (first published in Vita C.E. Rumphii Plinii Indici 1833) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Chinese water chestnut, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: りなべる, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 8a – 11b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
Identify Plants Like the
Chinese water chestnut Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species